British and American Spelling

Here are the main differences in spelling between British English (BrE) and American English (AmE). Test yourself with these fun American spelling quizzes and British/American spelling quizzes

notes	British English	American English
Final -l is always doubled after one vowel in stressed and unstressed syllables in BrE but usually only in stressed syllables in AmE, for example:	rebel, rebelled travel, travelled	rebel, rebelled travel traveled
Some words end in -tre in BrE and -ter in AmE, for example:	centre theatre	center theater
Some words end in -ogue in BrE and -og in AmE, for example:	analogue catalogue	analog catalog
Some words end in -our in BrE and -or in AmE, for example:	colour labour	color labor
Some verbs end in -ize or -ise in BrE but only in -ize in AmE, for example:	realise, realize	realize

Common Differences

British English	American English
all right	all right, alright
analyse	analyze
centre	center
cheque	check
colour	color
counsellor	counselor
criticise, criticize	criticize
defence	defense
doughnut	donut
favour	favor
fibre	fiber
flavour	flavor
fulfil	fulfill
grey	gray
honour	honor
humour	humor
jewellery	jewellery, jewelry
judgement, judgment	judgment
kerb	curb
labour	labor
license, licence (verb) licence (noun)	license (verb) license (noun)
litre	liter
metre	meter
mould	mold
neighbour	neighbor
offence	offense
practise (verb) practice (noun)	practice (verb) practice (noun)
pretence	pretense
programme (plan, concert etc) program (computer software)	program program
pyjamas	pajamas
realise, realize	realize
savour	savor
speciality	specialty
theatre	theater
travelled travelling	travelled, traveled travelling, traveling
tyre	tire
valour	valor